Add lazy image placeholder tap handling.
Add lazy image placeholder tap handling.

Note that the lazy tranform adds an extra 'data-' to the 'data-' attributes from our original img tag.

wikimedia/wikipedia-ios,josve05a/wikipedia-ios,wikimedia/wikipedia-ios,wikimedia/wikipedia-ios,montehurd/apps-ios-wikipedia,montehurd/apps-ios-wikipedia,julienbodet/wikipedia-ios,julienbodet/wikipedia-ios,julienbodet/wikipedia-ios,wikimedia/wikipedia-ios,wikimedia/wikipedia-ios,wikimedia/wikipedia-ios,josve05a/wikipedia-ios,wikimedia/apps-ios-wikipedia,josve05a/wikipedia-ios,julienbodet/wikipedia-ios,wikimedia/wikipedia-ios,josve05a/wikipedia-ios,wikimedia/apps-ios-wikipedia,julienbodet/wikipedia-ios,montehurd/apps-ios-wikipedia,montehurd/apps-ios-wikipedia,wikimedia/apps-ios-wikipedia,wikimedia/apps-ios-wikipedia,julienbodet/wikipedia-ios,josve05a/wikipedia-ios,josve05a/wikipedia-ios,wikimedia/apps-ios-wikipedia,julienbodet/wikipedia-ios,wikimedia/apps-ios-wikipedia,julienbodet/wikipedia-ios,montehurd/apps-ios-wikipedia,montehurd/apps-ios-wikipedia,montehurd/apps-ios-wikipedia,josve05a/wikipedia-ios,montehurd/apps-ios-wikipedia,josve05a/wikipedia-ios,wikimedia/apps-ios-wikipedia,wikimedia/apps-ios-wikipedia